$a+b-c-b+2c-a$

$27-\left(-26\right)-\left(-18\right)-25+\left(-31\right)-\left(-44\right)-\left(-26\right)-\left(-19\right)-23$

$\int x\left(3x^3-5x^2+3x+4\right)dx$

$\left(3x+2y\right)\left(7x-y\right)$

$\left(x+10\right)\left(x+12\right)$

$\frac{dy}{dx}=6xy^{10}+y$

$\int\left(2x^2\right)\sqrt{x-1}dx$